Class: Riser::TimeoutSizedQueue

Inherits:
Object
  • Object
show all
Defined in:
lib/riser/server.rb

Instance Method Summary collapse

Constructor Details

#initialize(max_size, name: nil) ⇒ TimeoutSizedQueue

Returns a new instance of TimeoutSizedQueue.



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# File 'lib/riser/server.rb', line 9

def initialize(max_size, name: nil)
  @max_size = max_size
  @queue = []
  @closed = false
  @mutex = Thread::Mutex.new
  @push_cond = Thread::ConditionVariable.new
  @pop_cond = Thread::ConditionVariable.new
  @name = name && name.dup.freeze
  @stat_enable = false
end

Instance Method Details

#at_end_of_queue? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/riser/server.rb', line 42

def at_end_of_queue?
  @mutex.synchronize{ @closed && @queue.empty? }
end

#close ⇒ Object 



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# File 'lib/riser/server.rb', line 34

def close
  @mutex.synchronize{
    @closed = true
    @pop_cond.broadcast
  }
  nil
end

#closed? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/riser/server.rb', line 30

def closed?
  @mutex.synchronize{ @closed }
end

#empty? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/riser/server.rb', line 26

def empty?
  @mutex.synchronize{ @queue.empty? }
end

#pop ⇒ Object 



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# File 'lib/riser/server.rb', line 67

def pop
  @mutex.synchronize{
    if (@stat_enable) then
      @stat_pop_count += 1
      @stat_pop_average_queue_size = (@stat_pop_average_queue_size * (@stat_pop_count - 1) + @queue.size) / @stat_pop_count
    end
    while (@queue.empty?)
      @closed and return
      @stat_pop_wait_count += 1 if @stat_enable
      @pop_cond.wait(@mutex)
    end
    @push_cond.signal if (@queue.size == @max_size)
    @queue.shift
  }
end

#push(value, timeout_seconds) ⇒ Object 



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# File 'lib/riser/server.rb', line 46

def push(value, timeout_seconds)
  @mutex.synchronize{
    @closed and raise 'closed'
    if (@stat_enable) then
      @stat_push_count += 1
      @stat_push_average_queue_size = (@stat_push_average_queue_size * (@stat_push_count - 1) + @queue.size) / @stat_push_count
    end
    unless (@queue.size < @max_size) then
      @stat_push_wait_count += 1 if @stat_enable
      @push_cond.wait(@mutex, timeout_seconds)
      unless (@queue.size < @max_size) then
        @stat_push_timeout_count += 1 if @stat_enable
        return
      end
    end
    @pop_cond.signal if @queue.empty?
    @queue.push(value)
    self
  }
end

#size ⇒ Object Also known as: length 



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# File 'lib/riser/server.rb', line 20

def size
  @mutex.synchronize{ @queue.size }
end

#stat_get(reset: true) ⇒ Object 



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# File 'lib/riser/server.rb', line 112

def stat_get(reset: true)
  if (@stat_enable) then
    info = nil
    @mutex.synchronize{
      info = {
        queue_name:              @name,
        max_size:                @max_size,
        closed:                  @closed,
        start_time:              @stat_start_time,
        push_average_queue_size: @stat_push_average_queue_size,
        push_count:              @stat_push_count,
        push_wait_count:         @stat_push_wait_count,
        push_timeout_count:      @stat_push_timeout_count,
        pop_average_queue_size:  @stat_pop_average_queue_size,
        pop_count:               @stat_pop_count,
        pop_wait_count:          @stat_pop_wait_count
      }

      if (reset) then
        stat_reset_no_lock
      end
    }

    info[:get_time]           = Time.now
    info[:elapsed_seconds]    = info[:get_time] - info[:start_time]
    info[:push_wait_ratio]    = info[:push_wait_count].to_f    / info[:push_count]
    info[:push_timeout_ratio] = info[:push_timeout_count].to_f / info[:push_count]
    info[:pop_wait_ratio]     = info[:pop_wait_count].to_f     / info[:pop_count]

    # sort
    [ :queue_name,
      :max_size,
      :closed,
      :start_time,
      :get_time,
      :elapsed_seconds,
      :push_average_queue_size,
      :push_count,
      :push_wait_count,
      :push_wait_ratio,
      :push_timeout_count,
      :push_timeout_ratio,
      :pop_average_queue_size,
      :pop_count,
      :pop_wait_count,
      :pop_wait_ratio
    ].each do |name|
      info[name] = info.delete(name)
    end

    info
  end
end

#stat_start ⇒ Object 



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# File 'lib/riser/server.rb', line 95

def stat_start
  @mutex.synchronize{
    unless (@stat_enable) then
      stat_reset_no_lock
      @stat_enable = true
    end
  }
  nil
end

#stat_stop ⇒ Object 



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# File 'lib/riser/server.rb', line 105

def stat_stop
  @mutex.synchronize{
    @stat_enable = false
  }
  nil
end